Results 101 to 110 of about 1,624 (212)

Predicted genetic consequences of alternative population control strategies for North American plains bison in Yellowstone National Park

The Journal of Wildlife Management, Volume 90, Issue 5, July 2026.
Management of bison in Yellowstone National Park under the available strategies that maintained ≥3,500 individuals (1:1 sex ratio), removed <40% of the population at a time and prioritized relatives for removal were predicted to maintain genetic variation at levels consistent with long‐term conservation (>95% of existing variation).
Shawna J. Zimmerman, Chris Geremia, Sara J. Oyler‐McCance   +2 more
wiley   +1 more source

Use of isotopic sulfur to determine whitebark pine consumption by Yellowstone bears: A reassessment

Wildlife Society Bulletin, 2014
Use of naturally occurring stable isotopes to estimate assimilated diet of bears is one of the single greatest breakthroughs in nutritional ecology during the past 20 years. Previous research in the Greater Yellowstone Ecosystem (GYE), USA, established a
Charles C. Schwartz, Justin E. Teisberg, Jennifer K. Fortin, Mark A. Haroldson, Christopher Servheen, Charles T. Robbins, Frank T. van Manen   +6 more
doaj   +1 more source

Density‐dependent habitat selection in plains bison

The Journal of Wildlife Management, Volume 90, Issue 5, July 2026.
Using GPS collar data, we tested whether habitat selection of plains bison in Grasslands National Park, Canada, was density dependent. Bison selected for areas of high vegetation productivity far from human activity when population density was low and increased use of lower productivity habitat closer to disturbance as density increased.
Michelle L. Sawatzky, Branden T. Neufeld, Stefano Liccioli, Philip D. McLoughlin   +3 more
wiley   +1 more source

Ursids evolved dietary diversity without major alterations in metabolic rates

Scientific Reports
The diets of the eight species of ursids range from carnivory (e.g., polar bears, Ursus maritimus) to insectivory (e.g., sloth bears, Melursus ursinus), omnivory (e.g., brown bears, U.
A. M. Carnahan, A. M. Pagano, A. L. Christian, K. D. Rode, Charles T. Robbins   +4 more
doaj   +1 more source

Ultrasonographic and Endoscopic Findings of Pancreatic Adenocarcinoma With Duodenal Invasion in a Brown Bear (Ursus arctos)

Veterinary Radiology &Ultrasound, Volume 67, Issue 4, July 2026.
ABSTRACT This report describes a 25‐year‐old, intact male brown bear (Ursus arctos) presenting with weight loss, diarrhea, melena, apathy, and a 12% hematocrit. Ultrasound showed proximal duodenal wall thickening with submucosal cysts and a large, heterogeneous, highly vascularized mass in the descending duodenum, containing small gas pockets and ...
Mariana Giendruczak de Souza, Arthur Carlos da Trindade Alves, Bernardo de Paula Miranda, Felipe Kataoka, Bruna Patrícia Siqueira Raimundo, Daniela Oliveira Rocha, Daniel Guimarães Ubiali, Gabriela Castro Lopes Evangelista, Marcus Antônio Rossi Feliciano   +8 more
wiley   +1 more source

Application of Species Distribution Models (SDMs) and Corridor Mapping for Conservation of an Endangered Charismatic Mammal: Brown Bear (Ursus arctos) in Iran

Ecology and Evolution, Volume 16, Issue 6, June 2026.
ABSTRACT The brown bear (Ursus arctos) is the largest terrestrial carnivore in Iran with a rapidly shrinking range. In this study, we assembled the most comprehensive and up‐to‐date distribution dataset of the brown bear in Iran. We applied Species Distribution Models (SDMs) and corridor mapping to identify this charismatic mammal's suitable habitats ...
Farnoosh Kouchali, Bagher Nezami, Masoud Yousefi   +2 more
wiley   +1 more source

The Relationships of Season, Climate, Habitat, and Sex Variables With Fecal Cortisol, Progesterone, and Testosterone Metabolite Concentrations in Roe Deer

Ecology and Evolution, Volume 16, Issue 6, June 2026.
Roe deer in Kiasar National Park and Wildlife Refuge, Iran; Photo by Hamed Tizrooyan. This study examined how seasonal, climatic, topographic, habitat, and sex variables influence fecal cortisol, testosterone, and progesterone metabolite concentrations in roe deer populations within Iran's Kiasar National Park and Wildlife Refuge through fecal sample ...
Seyed Mehdi Amininasab, Zarbakht Ansari Pirsaraei, Ahmad Yousefpour Bisheh   +2 more
wiley   +1 more source

The King in the Crosshairs: Evidence of a Predation Attempt on European Bison by Wolves

Ecology and Evolution, Volume 16, Issue 6, June 2026.
To our knowledge, we present the first video‐recorded evidence of wolves attacking a European bison herd in the BPF. The European bison, often referred to as the king of the forest, is generally described as a non‐prey species, but historical data and our recent documented observation provide clear evidence that they can be subjected to wolf predation.
Robin Rozemarijn Wijnands, Tomasz Borowik   +1 more
wiley   +1 more source

Distribution of metals in the femoral bone of the brown bear (Ursus arctos Linnaeus, 1758) [PDF]

, 2018
Ovim radom istražile su se razine olova, stroncija, kalcija i cinka u 41 bedrenoj kosti smeđeg medvjeda (Ursus arctos Linnaeus, 1758) s područja Like i Gorskog kotara prikupljenih tijekom 2014 i 2015. godine.
Nemet, Mateja
core  

Investigating the relationship between antipredator behavior and human disturbance using LiDAR imagery

Ecosphere, Volume 17, Issue 6, June 2026.
Abstract The human‐built environment influences the behavior and survival of many species, but most of these studies have been conducted in urban areas. Yet, anthropogenic development may impact species differently across scales, including at the rural level. We examined whether the built environment in a rural area obstructed visibility and influenced
Katie A. Adler, Daniel T. Blumstein
wiley   +1 more source